<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card class="box-card">
      <el-row :gutter="20">
        <!-- 搜索框 -->
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <!-- 添加用户 -->
        <el-col :span="4">
          <el-button type="primary" @click="dialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表 -->
      <el-table :data="userList" stripe border>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="username" label="姓名"></el-table-column>
        <el-table-column prop="email" label="邮箱"></el-table-column>
        <el-table-column prop="mobile" label="电话"></el-table-column>
        <el-table-column prop="role_name" label="角色"></el-table-column>
        <el-table-column prop="mg_state" label="状态">
          <template v-slot="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180">
          <template v-slot="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
            ></el-button>
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="delCurrentUser(scope.row.id)"
            ></el-button>
            <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
              <!-- 分配角色按钮 -->
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="showRoleDialog(scope.row)"
              ></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <!-- 添加用户对话框 -->
    <el-dialog title="添加用户" :visible.sync="dialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="handleFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑用户信息对话框 -->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="handleFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配角色对话框 -->
    <el-dialog title="分配角色" :visible.sync="roleDialogVisible" width="50%" @close="roleDialogClosed">
      <div>
        <p>当前用户：{{ userInfo.username }}</p>
        <p>当前角色：{{ userInfo.role_name }}</p>
        <p>
          分配新角色：
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id"
            ></el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer">
        <el-button @click="roleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    // 自定义校验规则
    var checkEmail = (rule, value, callback) => {
      const regEmail = /^\w+@\w+(\.\w+)+$/

      if (regEmail.test(value)) return callback()
      callback(new Error('请输入合法的邮箱！'))
    }

    var checkMobile = (rule, value, callback) => {
      const regMobile = /^1[34578]\d{9}$/

      if (regMobile.test(value)) return callback()

      callback(new Error('请输入合法的手机号！'))
    }

    return {
      queryInfo: {
        query: '',
        // 当前页数
        pagenum: 1,
        // 当前页条数
        pagesize: 2
      },
      userList: [],
      // 角色列表
      rolesList: [],
      selectedRoleId: '',
      total: 0,
      userInfo: {},
      // 控制添加用户对话框的显示与隐藏
      dialogVisible: false,
      // 控制编辑用户对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配角色对话框的显示与隐藏
      roleDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 编辑用户的表单数据
      editForm: {},
      // 表单验证规则
      handleFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    // 获取用户列表
    async getUserList() {
      const { data: res } = await this.$http.get('users', {
        params: this.queryInfo
      })

      if (res.meta.status !== 200) {
        return this.$message.error('用户列表获取失败')
      }

      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听 pagesize 改变的事件处理函数
    handleSizeChange(newSize) {
      // 修改每页的条数
      this.queryInfo.pagesize = newSize
      // 再次发送请求
      this.getUserList()
    },
    // 监听 页码值 改变的事件处理函数
    handleCurrentChange(newPage) {
      // 修改当前页数
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 修改用户状态
    async userStateChanged(userInfo) {
      const { data: res } = await this.$http.put(
        `users/${userInfo.id}/state/${userInfo.mg_state}`
      )

      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error('用户状态修改失败！')
      }

      this.$message.success('用户状态修改成功！')
    },
    // 关闭 Dialog 对话框时执行的事件处理函数
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加用户
    addUser() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return

        const { data: res } = await this.$http.post('users', this.addForm)

        if (res.meta.status !== 201) this.$message.error('添加用户失败！')

        this.$message.success('添加用户成功！')
        this.dialogVisible = false
        this.getUserList()
      })
    },
    // 显示用户编辑对话框
    async showEditDialog(id) {
      // 发送请求获取被编辑用户的数据
      const { data: res } = await this.$http.get('users/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('用户信息查询失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置编辑对话框
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 提交编辑信息
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return

        const { data: res } = await this.$http.put(
          'users/' + this.editForm.id,
          {
            email: this.editForm.email,
            mobile: this.editForm.mobile
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('用户信息修改失败！')
        }
        // 关闭编辑对话框
        this.editDialogVisible = false
        // 重新获取数据
        this.getUserList()
        // 用户信息修改成功对话框
        this.$message.success('用户信息修改成功！')
      })
    },
    // 删除用户
    async delCurrentUser(id) {
      const confirmInfo = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 通过 catch 来监听错误
      // 点击确定返回 confirm，点击取消返回 cancel
      if (confirmInfo !== 'confirm') {
        return this.$message.info('已取消删除！')
      }

      // 发送请求删除用户
      const { data: res } = await this.$http.delete('users/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败！')
      }
      this.$message.success('删除用户成功！')
      // 重新获取数据
      this.getUserList()
    },
    // 显示分配角色对话框
    async showRoleDialog(userInfo) {
      this.userInfo = userInfo
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.rolesList = res.data

      this.roleDialogVisible = true
    },
    // 更新角色
    async saveRoleInfo() {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择用户角色！')
      }

      const { data: res } = await this.$http.put(
        `users/${this.userInfo.id}/role`,
        {
          rid: this.selectedRoleId
        }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('用户角色更新失败！')
      }

      this.getUserList()

      this.roleDialogVisible = false
    },
    // 关闭分配角色对话框时执行的事件处理函数
    roleDialogClosed() {
      this.userInfo = {}
      this.selectedRoleId = ''
    }
  }
}
</script>

<style lang="less" scoped>
</style>
